PURPOSE:Understanding complex abdominal organ motion is essential for motion management in radiation therapy (RT) of abdominal tumors. This study investigates abdominal motion induced by respiration and peristalsis. during various time durations relevant to RT. using various CT and MRI techniques acquired under free breathing (FB) and breath hold (BH). https://bellfordtoysandhobbiers.shop/product-category/military-spacecraft-model-kit/